I am going to check my plants in the greenhouse and see what if any damages occur in it. I don't think they froze, I had a space heater in there, but it got 90 in the greenhouse during the day and I had covers over the plants. I was out of town and I don't think my husband opened up the greenhouse to let the heat escape. I afraid to ask. Friday morning it was 17 degrees outside a t 7:30 a.m. today it is 19 degrees. Thanks again all for the help. Pat